KR101779492B1

KR101779492B1 - Waste water treatment system

Info

Publication number: KR101779492B1
Application number: KR1020150137618A
Authority: KR
Inventors: 박창원; 전성훈
Original assignee: (주)대신환경기술
Priority date: 2015-09-30
Filing date: 2015-09-30
Publication date: 2017-09-19
Also published as: KR20170038349A

Abstract

The present invention relates to a grit chamber for supplying wastewater and precipitating impurities and forming a primary treatment water from which impurities have been removed; An ozone contact tank which receives the primary treated water from the gypsum and receives the primary treated water and the ozone to form the ozone treated water; And a contact oxidation bioreactor which receives ozone treatment water from an ozone contact tank and nitrifies and denitrifies ozone treatment water to form secondary treatment water. The wastewater treatment system of the present invention can convert the hardly decomposable organic matter into the easily decomposable organic matter by the high-efficiency ozone contact tank. In addition, it is necessary to add nitrification reaction and denitrification reaction simultaneously by introducing adherent growth method using microorganism propagation in a bioreactor, and since a sludge having a high specific gravity can be precipitated in the reaction tank, It is possible to reduce the manufacturing cost, reduce the amount of sludge, and improve the wastewater treatment efficiency by forming an integrated bioreactor of the sedimentation tank and the bioreactor.

Description

WASTE WATER TREATMENT SYSTEM [0001]

More particularly, to a wastewater treatment system including a high-efficiency ozone contact tank capable of treating wastewater containing a refractory organic substance and nitrogen, and a bioreactor in which a settling tank and a bioreactor are integrated .

Water pollution can occur due to the discharge of domestic wastewater and industrial wastewater.

The causes of water pollution include organic matter and minerals such as nitrogen. Recently, due to the increase of the degradation chemicals, the existing treatment facilities are insufficiently treated and remain in the environment, thus causing a great concern of causing bioconcentration and toxicity. Nitrogen causes eutrophication, green algae and red tide to accelerate the generation of harmful living organisms, increase the chemical oxygen demand, and cause the organic matter to exceed the water's self-purification action, accelerating water pollution and destroying the aquatic ecosystem Therefore, water quality standards of phosphorus and nitrogen in domestic and foreign countries are getting more and more strengthened.

Since waste and wastewater generated in the life, industry, and livestock industries contain refractory organic matter and high concentration of nitrogen, it is necessary to treat it within the discharge water quality standard.

As a method for treating wastewater containing such refractory organic substances and nitrogenous pollutants, there has been proposed a method in which a high-efficiency ozone contact transforms a refractory organic substance molecule into a degradable organic substance through a structural change, It uses the principle that the contaminants are taken up by the nutrients and used to assimilate or assimilate them. Microorganisms can be divided into anaerobic microorganisms, aerobic microorganisms, and random microorganisms depending on how oxygen is used.

The aerobic microorganisms oxidize the organic matter to carbon dioxide by using dissolved oxygen in the water as an electron acceptor. However, the anaerobic microorganism uses an external organic substance such as oxygen as an electron acceptor to cause a redox reaction. As a result, methane can be produced from the organic substance, Can utilize the coupled oxygen as an electron acceptor to cascade and assimilate.

In a bioreactor, which is generally used in a general wastewater treatment system, the microorganism propagation is made by a floating growth method in which the microorganism is floated in water without a mediator. The bioreactor using the microorganism growth according to the floating growth method has a problem that the nitrification action in the aerobic environment and the denitrification reaction in the random environment must be performed separately in the tank and the removal of the refractory organic material is difficult. In addition, when the amount of suspended microorganisms reaches a predetermined concentration or more, it is necessary to remove the suspended microorganism. Therefore, a separate sedimentation tank for removing the sedimentation tank must be additionally provided, resulting in a high production cost and a large amount of sludge.

Japanese Patent Application Laid-Open No. 10-2015-0055258 Japanese Patent Application Laid-Open No. 10-2013-0003522

An object of the present invention is to provide a wastewater treatment system capable of converting a decomposable organic substance into a decomposable organic substance that can be easily decomposed by introducing a highly efficient ozone contact reaction tank.

In addition, nitrification reaction takes place outside the medium in which aerobic environment is formed by introducing adherent growth method using microorganism propagation in a biological reactor, denitrification occurs inside the medium where random environment is formed, nitrification reaction and denitrification The sludge having a high specific gravity is formed in the reaction tank and can be settled naturally. Therefore, it is possible to reduce the manufacturing cost by including the integrated bioreactor of the settling tank and the bioreactor, which does not need a separate settling tank, And to provide a wastewater treatment system capable of improving effluent treatment efficiency.

According to an aspect of the present invention, there is provided a grit chamber, comprising: a grit chamber for receiving wastewater to precipitate impurities and forming primary treated water from which the impurities have been removed; An ozone contact tank that receives the primary treatment water from the gypsum and forms ozone treatment water by contacting the primary treatment water with ozone; And a contact oxidation bioreactor that receives ozone treatment water from the ozone contact tank and nitrifies and denitrates the ozone treatment water to form secondary treatment water.

Wherein the wastewater treatment system is disposed between the gravel bed and the ozone contact tank, stores the primary treatment water introduced from the gravel bed, mixes with the air, and supplies the water and the water to the ozone contact tank May be further included.

Wherein the wastewater treatment system includes a filter medium that is supplied with the secondary treatment water from the contact oxidation bioreactor and formed in a multi-layered structure, the secondary treatment water is filtered with the filter material to remove fine impurities to form final treatment water A multi-layer filter may be further included.

Wherein the wastewater treatment system is located between the contact oxidation bioreactor and the multi-layer filter, receives and stores the secondary treatment water from the contact oxidation bioreactor, and supplies the secondary treatment water to the multi-layer filter A treatment water tank may be further included.

The wastewater treatment system may further include a reusing water tank for supplying and storing the final treated water from the multi-layered filter, and supplying the backwash water to the multi-layered filter to regenerate the filter unit.

The wastewater treatment system may further include a sludge storage tank for receiving, storing, and discharging excess sludge from the contact oxidation bioreactor.

Wherein the ozone contact tank is in the form of a hollow tube and receives ozone saturation water containing fine ozone in the primary treatment water to form a downward flow and partially dissolves the fine ozone in the primary treatment water; The ozone-saturated water and the ozone-depleted ozone are partially dissolved from the induction pipe, and the upward flow from the outer peripheral surface side of the induction pipe And forming ozone-treated water by ozone treatment; And an ozone generator for generating ozone and supplying ozone to an upper end of the main body.

The induction pipe

An induction pipe body which is in the form of a hollow tube and which receives the primary treatment water and fine ozone to form a downward flow and dissolves the fine ozone in the primary treatment water;

An ozone-saturated water inflow nozzle connected to the upper end of the induction tube body and to which ozone saturation water containing fine ozone is introduced into the primary treatment water;

A primary treatment water inflow nozzle branched at a predetermined position above the induction tube body and allowing the primary treatment water to flow into the induction tube body; And

And an induction tube connected to a lower end of the induction tube body and having an angle with the induction tube body to induce the downflow to the outside of the induction tube to form an upward flow.

The main body includes an ozone inflow nozzle connected to the ozone generating unit and introducing ozone into the upper end of the main body. A drain port through which fluid is discharged to a predetermined upper portion of the main body; An ozone discharge nozzle located at a position relatively higher than the drain port of the main body and discharging ozone; And an ozone-treated water discharge nozzle which is present at a predetermined position on the main body and discharges ozone-treated water that has been subjected to ozone treatment.

The wastewater treatment system may further include a saturator that receives ozone from the ozone contact tank and saturates fine ozone in the primary treatment water to form ozone saturated water.

An inlet nozzle for supplying the ozone and the first treated water from the ozone outlet nozzle and the drain port of the ozone contact tank to the inside of the saturated bath; An inner hollow tube which is in the form of a hollow tube and receives the ozone and the primary treatment water from the inflow nozzle to form a downward flow; And a side wall which maintains a predetermined gap from the outer circumferential surface of the inner hollow tube and forms an upward flow between the outer circumferential surface of the inner hollow tube and the side wall, An outer tube for forming ozone-saturated water containing fine ozone in the primary treatment water by forming a stream; And a body having an upper end connected to the inflow nozzle, an inlet for receiving the inner hollow tube and the outer tube, and an outlet for discharging the ozone saturated water to the outside at the lower end.

The saturating vessel may further include an air vent located at an upper end of the body and discharging bubbles not dissolved in the ozone saturation water to the outside.

The saturating tank may be located at the upper end of the body and may further include a pressure gauge for controlling the pressure of the fluid in the saturating tank.

The flow rate adjusting tank may further include a blower for introducing air into the primary treatment water.

Wherein the contact oxidation bioreactor comprises: an inner hollow tube in the form of a hollow tube; An outer hollow tube in the form of a hollow tube and positioned to surround the outer circumferential surface of the inner hollow tube with a predetermined gap therebetween and including a relatively high sidewall relative to the side wall of the inner hollow tube; The upper portion of the tank contains a weir which flows out to the outside. The lower portion of the tank is a funnel type whose diameter becomes smaller toward the lower portion. The lower portion of the tank is filled with sludge A sludge collecting portion including an outlet through which the sludge is discharged; An outer sidewall surrounding the upper portion of the body including the weir and including a second treated water outlet for discharging the secondary treated water at a predetermined position; An air inlet pipe for introducing air from the outside into the lower portion of the inner hollow tube; And an ozone treatment water inflow pipe for introducing the ozone treatment water from the outside into the lower portion of the inner hollow tube.

The contact oxidation bioreactor may include a mixed liquor suspended solid (MLSS).

The MLSS (mixed liquor suspended solid) may comprise aerobic microorganisms and optionally microorganisms.

The nitrification reaction and the denitrification reaction can occur simultaneously in the contact oxidation bioreactor.

The air inlet pipe may further include an air diffuser having a plurality of fine holes formed therein to disperse air into the lower portion of the inner hollow tube.

And a plurality of fine holes for dispersing the air at the distal end thereof may be formed in a funnel shape having a larger diameter as the air diffusing pipe is connected to the air inlet pipe.

The ozone treatment water inlet pipe may further include a plurality of branch pipes uniformly dispersing the ozonized water.

The multi-layer filter includes a body including a manhole, which is an entrance through which the multi-layer filter is housed, at a predetermined lower position, the multi-layer filter includes a filter medium input port for receiving a multi-layer filter medium and inputting a filter medium at an upper end thereof. A secondary treatment water inlet formed at a predetermined position above the body and into which the secondary treatment water is introduced; A final treated water outlet formed at a predetermined lower portion of the body, through which the final treated water having the remaining impurities removed through the filter member flows out; A backwash water inlet formed at a predetermined lower portion of the body and through which the backwash water flows; And a backwash water outlet formed at a predetermined position on the body, the backwash water passing through the filter material, regenerating the filter material by removing impurities, and returning backwash water together with the impurities.

The filter medium may include at least one selected from a gravel layer, a sand layer, an anthracite layer, and an activated carbon layer.

The secondary treatment water inlet, the final treated water outlet, the backwash water inlet, and the backwash water outlet may each be connected to a valve.

The valves connected to the secondary treatment water inlet, the final treated water outlet, the backwash water inlet and the backwash water outlet respectively may include a manual valve and an automatic valve.

According to another aspect of the present invention, there is provided a car wash wastewater treatment system including the wastewater treatment system.

The wastewater treatment system of the present invention can introduce a high-efficiency ozone contact bath to convert the refractory organic matter into the easily degradable organic matter. In addition, nitrification reaction takes place outside the medium in which aerobic environment is formed by introducing adherent growth method using microorganism propagation in a biological reactor, denitrification occurs inside the medium where random environment is formed, nitrification reaction and denitrification So that the sludge having a high specific gravity is formed in the reaction tank and can be settled naturally. Therefore, it is possible to reduce the manufacturing cost by forming the integrated bioreactor of the settling tank and the bioreactor, which does not require separate settling tank, And improve the effluent treatment efficiency.

1 is a process diagram of a wastewater treatment system in accordance with an embodiment of the present invention.
2 is a facility top view of a wastewater treatment system according to an embodiment of the present invention.
3 is a side view and a top view of an ozone contact tank included in an embodiment of the present invention.
4 is a side view and a top view of a saturator included in an embodiment of the present invention.
5 is a side view and a top view of a contact oxidation bioreactor according to an embodiment of the present invention.
6 is a side view and a top view of a multi-layer filter included in an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Referring to the accompanying drawings, the same or corresponding components are denoted by the same reference numerals, do.

FIG. 1 is a process diagram of a wastewater treatment system according to an embodiment of the present invention, and FIG. 2 is a top view of a wastewater treatment system according to an embodiment of the present invention. FIG. 3 is a side view and a top view showing the structure of the ozone contact tank 300, and FIG. 4 is a side view and a top view showing the structure of the saturating tank 400. 5 is a side view and a top view showing the structure of the oxidation-biochemical reaction tank 500, and FIG. 6 is a side view and a top view showing the structure of the multilayer filter.

Hereinafter, a wastewater treatment system according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6. FIG.

A wastewater treatment system according to an embodiment of the present invention includes a gill 100, a flow rate control tank 200, an ozone contact tank 300, a saturator 400, a contact oxidation bioreactor 500, a treatment tank 600, A multi-layer filter 700, a reusing water tank 800, and a sludge storage tank 900.

The clinker sheet 100 may be supplied with wastewater to precipitate impurities and form the primary treated water from which the impurities have been removed. The primary treated water is treated water primarily containing impurities having a large specific gravity, and can flow to the flow rate regulating tank 200 through an opening formed at a predetermined position above the sedimentation bed.

The flow rate adjusting tank 200 is disposed between the gill 100 and the ozone contact tank 300 and temporarily stores the primary treatment water introduced from the gill 1000 and mixes the primary treated water with the air supplied from the outside, The water quality can be equalized and supplied to the ozone contact tank 300 by the raw water pump P1. Preferably, the residence time of the primary treatment water in the flow rate regulator 200 may be 0.5 to 1 day.

The flow rate regulating tank 200 may further include a blower 210, through which external air can be forcibly supplied to the primary treatment water.

3, the ozone contact tank 300 may include an induction pipe 320, a main body 310, and an ozone generating unit 330.

The induction pipe 320 is in the form of a hollow tube and can supply the ozone saturated water containing fine ozone to the primary treatment water to form a downward flow and dissolve the fine ozone in the primary treatment water.

Specifically, the induction tube 320 may include an induction tube body 322, a fine ozone inflow nozzle 326, a primary effluent inflow nozzle 324, and an induction tube 328.

The induction tube body 322 is in the form of a hollow tube and can receive the first treated water and the fine ozone to form a downward flow and dissolve the fine ozone in the first treated water.

The ozone-saturated water inflow nozzle 326 is connected to the upper end of the induction tube body 322, and ozone-saturated water containing fine ozone can be introduced into the primary treatment water.

The primary treated water inflow nozzle 324 branches at a predetermined position above the induction tube body 322 and allows the primary treated water to flow into the induction tube body 322.

The induction tube 328 is connected to the lower end of the induction tube body 322 and forms an angle with the induction tube body 322 to guide the downward flow to the outside of the induction tube to form an upward flow.

The main body 310 accommodates the induction pipe 320 at a predetermined distance from the outer circumferential surface of the induction pipe 320 and supplies the first treated water in which the ozone saturated water and the fine ozone are partially dissolved from the induction pipe 320 The main body 310 includes an ozone inlet nozzle 312, a drain port 316, an ozone outlet nozzle 314, and an ozone outlet port 314, , And an ozonated water outlet nozzle (318).

The ozone inflow nozzle 312 is connected to the ozone generator 330 and can introduce ozone into the upper end of the main body 310.

The drain hole 316 may allow the fluid to be discharged to a predetermined position above the main body 310.

The ozone discharge nozzle 314 is located at a position relatively higher than the discharge port 316 of the main body 310 and can discharge ozone.

The ozone-treated water outflow nozzle 318 is located at a predetermined position on the upper portion of the main body 310, and can ozone-treated ozone-treated water.

The ozone generator 330 generates ozone and can supply ozone to the upper end of the main body 310.

Referring to FIG. 4, the saturating tank 400 is supplied with the primary treated water and ozone from the ozone contact tank 300, and the ozone saturated water is formed by saturating the minute ozone with the primary treated water.

Specifically, the saturating tank 400 may include an inlet nozzle 420, an inner hollow tube 422, an outer tube 430, a body 410, an air vent 450, and a pressure gauge 460.

The inflow nozzle 420 can receive the ozone and the primary treated water from the ozone discharge nozzle 314 and the drain port 316 of the ozone contact tank 300 and can flow into the saturated tank 400. The ozone outflow nozzle 314 and the drain port 316 are connected to the pressure pump P2 and the ozone and the primary process water can be introduced into the saturator 400 by the pressure pump P2.

The inner hollow tube 422 is in the form of a hollow tube and can receive the ozone and the primary treatment water from the inflow nozzle 420 to form a downward flow.

The outer tube 430 is in the form of a hollow tube having a closed lower end and includes side walls that maintain a predetermined distance from the outer circumferential surface of the inner hollow tube 422 and forms an upward flow between the outer circumferential surface of the inner hollow tube 422 and the side wall And an ozone-saturated water containing fine ozone is formed in the primary treatment water by forming an upward flow on the outer peripheral surface side of the side wall.

The body 410 is a sealed tank and has an upper end connected to the inflow nozzle 420 and receives the inner hollow tube 422 and the outer tube 430 and has an outlet port 440 may be formed.

The air vent 450 is positioned at the upper end of the body 410 and allows the air bubbles not dissolved in the ozone saturated water to be discharged to the outside.

The pressure gauge 460 is located at the upper end of the body 410 of the saturating tank 400 and can control the pressure of the fluid in the saturating tank 400.

Referring to FIG. 5, the contact oxidation bioreactor 500 receives ozone-treated water from the ozone contact tank 300 and nitrifies and denitrates the ozone-treated water to form a secondary treated water.

The contact oxidation bioreactor 500 includes an inner hollow tube 530, an outer hollow tube 520, a body 510, an outer side wall 540, an air inflow tube 550, and an ozone treatment water inflow tube 560 , And may include a mixed liquor suspended solid (MLSS) therein.

The inner hollow tube 530 may be in the form of a hollow tube and may be a position for initially loading the MLSS.

The outer hollow tube 520 is in the form of a hollow tube and may be positioned to surround the inner hollow tube 530 with a predetermined gap therebetween and may include a relatively higher sidewall than the sidewall of the inner hollow tube 530.

The body 510 is a tank for receiving the inner hollow tube 530 and the outer hollow tube 520 and the upper portion includes a weir 516 for the fluid to pass to the outside, And a sludge collecting unit 512 including a sludge outlet 514 through which a sludge flows out at a predetermined position of a lower end.

The sludge outlet P3 is connected to the sludge transfer pump P3 through which the sludge can be transferred to the sludge storage tank 900.

The outer side wall 540 may include a secondary treated water outlet 542 surrounding the upper portion of the body 510 including the weir 516 and discharging the secondary treated water at a predetermined position.

The air inlet pipe 550 can introduce air into the lower portion of the inner hollow pipe 530 from the outside.

The ozone-treated water inlet pipe 560 can allow the ozone-treated water to flow from the outside to the lower portion of the inner hollow pipe 530.

The MLSS may comprise aerobic microorganisms and optionally microorganisms.

The MLSS can cause nitrification reaction on the outside where an aerobic environment can be formed, and denitrification on the inside where a random environment is formed. Therefore, the nitrification reaction and the denitrification reaction can occur at the same time, and it is not necessary to cause nitrification and denitrification in a separate tank as in the prior art, so that the process cost can be reduced and the effluent treatment efficiency can be improved.

In the contact oxidation bioreactor 500, the nitrite ions (NO ₂ ^- ) formed by the aerobic microorganisms can be directly denitrified in the anaerobic state. Accordingly, both nitrification and denitrification can be performed in the contact oxidation bioreactor 500. The details will be explained in the following wastewater treatment process.

The contact oxidation bioreactor 500 further includes an air diffuser 552 connected to the air inlet pipe 550 and having a plurality of micropores formed therein to disperse air into the lower portion of the inner hollow pipe 520 A wastewater treatment system characterized by.

The air inlet pipe 550 may further include an air diffuser 552 having a plurality of fine holes formed therein to disperse air into the lower portion of the inner hollow pipe 530.

Preferably, the air diffuser 552 has a funnel shape with a larger diameter as it moves away from the portion connected to the air inlet pipe 550, and a plurality of fine holes for dispersing the air at its ends.

The ozone treatment water inlet pipe 560 preferably further includes a plurality of branch pipes 562 for uniformly dispersing the ozonized water.

The treatment water tank 600 is disposed between the contact oxidation bioreactor 500 and the multi-layer filter 700 to receive and store the secondary treatment water from the contact oxidation bioreactor 500, And to supply the secondary treated water to the multi-layer filter 700 through the filtration pump P4.

The multi-layer filter 700 includes the filter material that is supplied with the secondary treatment water from the contact oxidation bioreactor 500 and formed in a multi-layered structure. The secondary treatment water is filtered with the filter material to remove fine impurities, Can be formed.

6, the multi-layer filter 700 includes a body 710, a secondary water inlet 720, a final water outlet 722, a backwash water inlet 730, and a backwash water outlet 732, . &Lt; / RTI >

The body 710 includes a filtering material inlet 740 for receiving a multi-layer filter medium and a filter material at an upper end thereof, and includes a manhole 750 as an entrance through which the multi-layer filter 700 can enter and exit at a predetermined lower position can do.

The secondary treatment water inlet 720 is formed at a predetermined position above the body 710, and the secondary treatment water can be introduced.

The final treated water outlet 722 is formed at a predetermined lower position of the body 710, and the final treated water through which the residual impurities are removed can be discharged through the filter medium.

The backwash water inlet 730 is formed at a predetermined lower position of the body 710, and backwash water can be introduced.

The backwash water outlet 732 is formed at a predetermined position above the body 710. The backwash water passes through the filter material and removes impurities to regenerate the filter material and the backwash water may flow out together with the impurities .

Each of the secondary treatment water inlet 720, the final treated water outlet 722, the backwash water inlet 730 and the backwash water outlet 732 may be connected to a valve.

A valve connected to each of the secondary process water inlet 720, the final process water outlet 722, the backwash water inlet 730 and the backwash water outlet 732 may include a manual valve 770 and an automatic valve 760 have.

The reusing water tank 800 receives and stores the final treated water from the multi-layer filter 700, and supplies the backwash water to the multi-layer filter 700 to regenerate the filter unit. The supply of the backwash water may be performed by the backwash pump P5. In addition, the stored treated water in the reusable water tank 800 can be transferred to the outside by the reusing pump P6.

The present invention provides a wastewater treatment system comprising the wastewater treatment system.

Hereinafter, the wastewater treatment process in the wastewater treatment system of the present invention will be described with reference to the flow of the fluid.

First, the fluid required to be treated by the gilt-mill 100 is wastewater. Here, the impurities having a large specific gravity of the wastewater are precipitated, and the impurity-removed primary treated water is formed.

Next, the primary treated water flows into the flow rate regulator 200 through the opening of the gypsum bed 100. The primary treatment water is temporarily stored in the flow rate control tank 200 for about 0.5 to 1 day, and the quantity and quality of water are equalized by the air supplied from the outside through the blower 210. Thereafter, the primary treated water whose water quality and water quality are equalized flows into the ozone contact tank 300 by the raw water pump P1.

Thereafter, the primary treated water flows into the guide pipe 320 through the primary treated water inflow nozzle 324 of the ozone contact tank 300. The ozone generated in the ozone generator 330 flows into the ozone contact tank 300 through the ozone inlet nozzle 312. The primary treatment water and ozone are discharged to the outside through the drain port 316 and the ozone discharge nozzle 314 and are moved to the saturator 400 by the pressure pump P2.

The ozone and the first treated water reaching the saturator 400 pass through the inner hollow tube 422 through the inflow nozzle 420 and form a downward flow. When the ozone and the first treated water pass through the inner hollow tube 422, And flows between the outer circumferential surface of the inner hollow tube 422 and the inner circumferential surface of the outer tube 430 to form an upward flow. In addition, the upward flow flows between the body 410 and the outer cylinder 430, forming a downward flow again, while ozone forms ozone saturated water that is saturated with the primary treatment water by the minute bubbles. The ozone saturated water flows out to the outside through the outlet 440.

Next, the ozone saturated water moves to the ozone contact tank 300. And flows to the induction pipe 320 through the ozone-saturated water inflow nozzle 326 to form a downward flow. The fluid flowing along the induction pipe 320 flows out through the induction pipe 328 to the main body 310 and naturally forms an upward flow. The fluid moves to the upper portion of the main body 310, flows to the drain port 316, flows into the saturating tank 400 again, and the above-described process is repeated. Ozone Saturated water dissolves fine ozone in the fluid while forming upflow and downflow in the ozone contact tank. By such ozone treatment, the ozone-treated water, which is changed into the decomposable organic substance which is easily decomposed due to a change in the molecular structure, is formed in the refractory organic substance which is an impurity in the fluid.

Thereafter, the ozone-treated water flows into the contact oxidation bioreactor 500. The ozone-treated water flows into the contact oxidation bioreactor 500 through the ozone-treated water inlet pipe 560 and is uniformly dispersed into the inner hollow tube 530 through the branch pipe 562. In addition, external air flows through the air inlet pipe 550 and is uniformly introduced into the internal hollow pipe 530 through the air diffuser 552. The MLSS is contained in the inner hollow tube 530, and aerobic microorganisms and random microorganisms are simultaneously contained therein. The ozone-treated water and the air are mixed in the inner hollow tube 530 to form an upward flow. Thereafter, when the fluid moves to the upper portion of the inner hollow tube 530, the fluid moves to the outer hollow tube 520 to form a downward flow between the outer side of the inner hollow tube 530 and the inner side of the outer hollow tube 520 . Next, the fluid moved downward forms an upward flow again between the outside of the side wall of the outer hollow tube 520 and the body 510, and the fluid that has moved to the upper end of the body 510 passes over the weir 516, Reaches the side wall, and flows out to the outside through the second treated water outlet 542. At this time, since the concentration of dissolved oxygen is high in the first aerobic environment in the flow leading to the upflow-downflow-upflow of the fluid, nitrification is caused by the aerobic microorganisms, and ammonium ion (NH ₄ ⁺ ) contained in the ammonia- A nitrite ion (NO ₂ ^- ) and a nitrate ion (NO ₃ ^- ) are sequentially formed. Thereafter, when oxygen is substantially consumed to form an arbitrary environment, the nitrate ions can be removed by denitrification by a discretionary microorganism, and nitrite ions can be directly removed by denitrification in the anaerobic state. Thus, secondary treatment water is formed.

In the conventional contact reaction tank, it is very difficult for microorganisms to directly denitrify nitrite ions having a very fast flow rate because of a fast flow rate. However, the contact oxidation bioreactor 500 introduced into the wastewater treatment system of the present invention is not limited to contact with the microorganisms Can be performed in the oxidation bioreactor 500, and the efficiency of denitrification can be further improved.

Since the sludge produced in the process of wastewater treatment in the contact oxidation bioreactor 500 has a large density, it naturally moves downward and collects in the sludge aggregate 512, flows out through the sludge outlet 514, And can be moved to the sludge reservoir 900 by the transfer pump P3.

When the microorganisms are grown without adhesion media, it is necessary to provide a separate settling tank for treating the impurities so that the impurities float or disperse in water because of low density. However, in the present invention, it is necessary to provide a separate settling tank It is possible to treat the microorganism as an integral type of the reaction tank and the settling tank, which is very economical.

The secondary treatment water is transferred to the treatment water tank 600, and is moved to the multi-layer filter 700 by the filtration pump P4. The secondary treatment water flows through the secondary treatment water inflow pipe 720, passes through the filter medium in the multi-layer filter 700 and is completely removed in the contact oxidation bioreactor 500 to treat impurities that have not been completely removed to form final treatment water And to the final treated water outlet 722.

The multi-layer filter 700 is detached from the filter material while repeating the above-described final process water forming process. Backwashing is necessary to remove it. In the backwashing, the water in the reusing water tank 800 flows into the backwash water inlet 730 by the backwash pump P5, and the water passes through the filter medium, removes impurities, and is discharged to the backwash water outlet 732. [ The backwash water containing the impurities can be moved to the reclaimed land 100 again and the above-described wastewater treatment process can be repeated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, many modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: Chimney 200: Flow regulating tank
210: blower 300: ozone contact tank
310: main body 312: ozone inlet nozzle
314: ozone spill nozzle 316: drain hole
318: ozone treatment water outflow nozzle 320: guide pipe
322: Induction tube body 324: Primary process water inflow nozzle
326: Ozone saturated water inflow nozzle 328: Induction slope tube
330: Ozone generator 400: Saturated tank
410: Body 420: Inlet nozzle
422: inner hollow tube 430: outer tube
440: Outlet 450: Air vent
460: Manometer 500: Contact oxidation bioreactor
510: body 512: sludge aggregate
514: Sludge outlet 516: Weir
520: outer hollow tube 530: inner hollow tube
540: outer side wall 542: second treated water outlet
550: air inlet pipe 552:
560: ozone treatment water inflow pipe 562: branch pipe
600: Treatment tank 700: Multi-layer filter
710: Body 720: Second process water inlet
722: final treated water outlet 730: backwash water inlet
732: backwash water outlet 740: filter medium inlet
750: Manhole 760: Automatic valve
770: Manual valve 800: Reuse tank
900: Sludge reservoir P1: raw water pump
P2: Pressure pump P3: Sludge transfer pump
P4: Filtration pump P5: Backwash pump
P6: Reuse pump

Claims

A grit chamber which receives wastewater to precipitate impurities and forms primary treated water from which the impurities have been removed;
An ozone contact tank that receives the primary treatment water from the gypsum and forms ozone treatment water by contacting the primary treatment water with ozone; And
And a contact oxidation bioreactor that receives ozone treatment water from the ozone contact tank and nitrifies and denitrates the ozone treatment water to form secondary treatment water,
Wherein the ozone-
An induction pipe in the form of a hollow tube for supplying ozone-saturated water containing fine ozone to the primary treatment water to form a downward flow and partially dissolving the fine ozone in the primary treatment water;
The ozone-saturated water and the ozone-depleted ozone are partially dissolved from the induction pipe, and the upward flow from the outer peripheral surface side of the induction pipe And forming ozone-treated water by ozone treatment; And
And an ozone generator for generating ozone and supplying ozone to an upper end of the main body,
The induction pipe
An induction pipe body which is in the form of a hollow tube and which receives the primary treatment water and fine ozone to form a downward flow and dissolves the fine ozone in the primary treatment water;
An ozone-saturated water inflow nozzle connected to the upper end of the induction tube body and to which ozone saturation water containing fine ozone is introduced into the primary treatment water;
A primary treatment water inflow nozzle branched at a predetermined position above the induction tube body and allowing the primary treatment water to flow into the induction tube body; And
And an induction pipe connected to a lower end of the induction pipe body and having an angle with the induction pipe body to induce the downflow to the outside of the induction pipe to form an upward flow.

The method according to claim 1,
Wherein the wastewater treatment system is disposed between the gravel bed and the ozone contact tank, stores the primary treatment water introduced from the gravel bed, mixes with the air, and supplies the water and the water to the ozone contact tank Further comprising: < RTI ID = 0.0 > a < / RTI >

The method according to claim 1,
Wherein the wastewater treatment system includes a filter medium that is supplied with the secondary treatment water from the contact oxidation bioreactor and formed in a multi-layered structure, the secondary treatment water is filtered with the filter material to remove fine impurities to form final treatment water Further comprising a multi-layer filter.

The method of claim 3,
Wherein the wastewater treatment system is located between the contact oxidation bioreactor and the multi-layer filter, receives and stores the secondary treatment water from the contact oxidation bioreactor, and supplies the secondary treatment water to the multi-layer filter Further comprising a treatment water tank.

The method of claim 3,
Wherein the wastewater treatment system further comprises a reusable water tank for supplying and storing the final treated water from the multi-layered filter, and supplying the backwash water to the multi-layered filter to regenerate the filter medium.

The method according to claim 1,
Wherein the wastewater treatment system further comprises a sludge storage tank for receiving, storing and discharging excess sludge from the contact oxidation bioreactor.

delete

The method according to claim 1,
Wherein,
An ozone inflow nozzle connected to the ozone generator and introducing ozone into the upper end of the main body;
A drain port through which fluid is discharged to a predetermined upper portion of the main body;
An ozone discharge nozzle located at a position relatively higher than the drain port of the main body and discharging ozone; And
And an ozone-treated water outlet nozzle which is located at a predetermined position on an upper portion of the main body and through which ozone-treated water having been subjected to ozone treatment flows out.

10. The method of claim 9,
Wherein the wastewater treatment system further comprises a saturator that receives ozone from the ozone contact tank and saturates fine ozone in the primary treatment water to form ozone saturated water. system.

11. The method of claim 10,
The saturating vessel,
An inflow nozzle for supplying the ozone and the primary treatment water from the ozone discharge nozzle and the discharge port of the ozone contact tank to the interior of the saturator;
An inner hollow tube which is in the form of a hollow tube and receives the ozone and the primary treatment water from the inflow nozzle to form a downward flow;
And a side wall which maintains a predetermined gap from the outer circumferential surface of the inner hollow tube and forms an upward flow between the outer circumferential surface of the inner hollow tube and the side wall, An outer tube for forming ozone-saturated water containing fine ozone in the primary treatment water by forming a stream; And
A body having an upper end connected to the inflow nozzle and accommodating the inner hollow tube and the outer tube and having an outlet for discharging the ozone saturated water to the outside at a lower end thereof;
Wherein the wastewater treatment system comprises:

12. The method of claim 11,
Further comprising an air vent for allowing the saturating tank to be located at an upper end of the body so that bubbles which are not dissolved in the ozone saturation water are discharged to the outside.

12. The method of claim 11,
Further comprising a pressure gauge positioned at the top of the body for controlling the pressure of fluid in the saturating tank.

3. The method of claim 2,
Further comprising a blower for allowing air to flow into said primary treatment water by said flow rate adjusting tank.

The method according to claim 1,
Wherein the contact oxidation bioreactor comprises:
An inner hollow tube in the form of a hollow tube;
An outer hollow tube in the form of a hollow tube and positioned to surround the outer circumferential surface of the inner hollow tube with a predetermined gap therebetween and including a relatively high sidewall relative to the side wall of the inner hollow tube;
The upper portion of the tank contains a weir which flows out to the outside. The lower portion of the tank is a funnel type whose diameter becomes smaller toward the lower portion. The lower portion of the tank is filled with sludge A sludge collecting portion including an outlet through which the sludge is discharged;
An outer sidewall surrounding the upper portion of the body including the weir and including a second treated water outlet for discharging the secondary treated water at a predetermined position;
An air inlet pipe for introducing air from the outside into the lower portion of the inner hollow tube; And
And an ozone treatment water inflow pipe for allowing the ozonized water to flow from the outside to the lower portion of the inner hollow tube.

16. The method of claim 15,
Wherein the contact oxidation bioreactor comprises a mixed liquor suspended solid (MLSS).

17. The method of claim 16,
Characterized in that the MLSS (mixed liquor suspended solid) comprises an aerobic microorganism and a random microorganism.

18. The method of claim 17,
Wherein the nitrification reaction and the denitrification reaction occur simultaneously in the contact oxidation bioreactor.

16. The method of claim 15,
Wherein the air inlet pipe is further connected to an air diffuser having a plurality of fine holes formed therein so as to disperse air to a lower portion of the inner hollow tube.

20. The method of claim 19,
And a plurality of fine holes are formed in the end of the funnel-shaped structure, the diameter of which is larger as the distance from the part of the air diffusing pipe that is connected to the air inlet pipe is larger, and the air is dispersed at the end.

16. The method of claim 15,
Wherein the ozone-treated water inlet pipe further comprises a plurality of branch pipes for uniformly dispersing the ozone-treated water.

The method of claim 3,
The multi-
A body including a manhole, which is an entrance through which the multi-layer filter is housed, a filtration material inlet for receiving the filter medium at the upper end thereof,
A secondary treatment water inlet formed at a predetermined position above the body and into which the secondary treatment water is introduced;
A final treated water outlet formed at a predetermined lower portion of the body, through which the final treated water having the remaining impurities removed through the filter member flows out;
A backwash water inlet formed at a predetermined lower portion of the body and through which the backwash water flows; And
And a backwash water outlet formed at a predetermined position above the body, the backwash water passing through the filter material, regenerating the filter material by removing impurities, and backwash water flowing out together with the impurities. Wastewater treatment system.

23. The method of claim 22,
Wherein the filter medium comprises at least one selected from a gravel layer, a sand layer, an anthracite layer, and an activated carbon layer.

23. The method of claim 22,
Wherein the secondary water inlet, the final water outlet, the backwash water inlet and the backwash water outlet are each connected to a valve.

25. The method of claim 24,
Wherein the valve connected to each of the secondary treatment water inlet, the final treatment water outlet, the backwash water inlet, and the backwash water outlet includes a manual valve and an automatic valve.

A car wash wastewater treatment system comprising the wastewater treatment system of claim 1.